GB843817A - Improvements in or relating to electromechanical transducers - Google Patents
Improvements in or relating to electromechanical transducersInfo
- Publication number
- GB843817A GB843817A GB2959/60A GB295960A GB843817A GB 843817 A GB843817 A GB 843817A GB 2959/60 A GB2959/60 A GB 2959/60A GB 295960 A GB295960 A GB 295960A GB 843817 A GB843817 A GB 843817A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- bifilar helix
- helix
- another
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
843,817. Electromagnetic transducers. CANADIAN WESTINGHOUSE CO. Ltd. Dec. 12, 1956 [Dec. 15, 1955], No. 2959/60. Divided out of 843,816. Class 40 (1). A transducer comprises two inductively coupled elements, one being a pair of separate coaxial helical conductors of the same radius and pitch having their turns alternating with one another, and the other being a helical conductor coaxial with the first and of the same pitch but of different radius. Preferably the second element also is a bifilar helix. In Fig. 2 the first element comprises a bifilar helix with connections at 6 and 8, the other ends being attached to one another at 7, and the second element is another bifilar helix with two separated windings 10-11 and 12-13. A.C. is supplied to the first element and induces in the two windings of the second element currents whose magnitudes will depend on the relative axial positions of the elements, and will also vary if the first element is rotated on its axis. Linear displacement can be measured by moving one element relative to the other and noting the number of maxima of current which occur in the second element. The fine position can be determined by rotating the first element until the current is a minimum and noting its angular movement. The transducer can also be used in the positioning system of Specification 843,816. The accuracy of the windings is improved by locating the wires in grooves on the elements. In Fig. 5 (not shown) the pick-up coil is a monofilar helix. In a further modification (Fig. 6, not shown) the bifilar helix of the pick-up coil is wound unsymmetrically, one winding being closer to the second winding on one side than the other; this gives a non-sinusoidal output with sharper nulls but it is not possible to use angular rotation of one element for fine measurements. Specification 604,382 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA843817X | 1955-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB843817A true GB843817A (en) | 1960-08-10 |
Family
ID=4172670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2959/60A Expired GB843817A (en) | 1955-12-15 | 1956-12-12 | Improvements in or relating to electromechanical transducers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB843817A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2424514A1 (en) * | 1978-04-27 | 1979-11-23 | Sergeev Alexandr | POLYWIRED DEVICE FOR CONVERTING TRAVELS INTO ELECTRIC SIGNAL |
| GB2151789A (en) * | 1983-12-16 | 1985-07-24 | Atomic Energy Authority Uk | Transducers for providing an electrical signal representative of physical movement |
-
1956
- 1956-12-12 GB GB2959/60A patent/GB843817A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2424514A1 (en) * | 1978-04-27 | 1979-11-23 | Sergeev Alexandr | POLYWIRED DEVICE FOR CONVERTING TRAVELS INTO ELECTRIC SIGNAL |
| GB2151789A (en) * | 1983-12-16 | 1985-07-24 | Atomic Energy Authority Uk | Transducers for providing an electrical signal representative of physical movement |
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